Crushing or pulverizing machine.



No. 680,650. Patented Aug. I3, 190i. C. F. DELFOS. CRUSHING'OBPULVEBIZING MACHINE.

(Application filed No v. 2B, 1900.)

2 SheeQs-Sheet I.

(No Model.)

M92502 Cozvzezz'a m g/ 2 THE NQRS PETERS CO PHOTO-LYING" WASHINGTON. C.

Patented Aug. l3, i901.

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c F. DELFOS. ORUSHING 0R PULVEBIZING MACHINE.

(Application filed Nov. 28, 1900.)

2 Sheets-Sheet 2.

(No Model.)

wa'ineaaw UNITED STATES CORNELIS FREDRIK DELFOS, OF PRETORIA, SOUTHAFRICAN REPUBLIC.

CRUSHINGOR PULVERIZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 680,650, dated August13, 1901. Application filed November 23,1900. Serial No. 37,529. (Nomodel.)

To all whom, it may concern.-

Be it known that LOORNELIs FREDRIK DEL- FOS, a citizen of the SouthAfrican Republic, residing at Pretoria, Transvaal, South Africa, but atpresent of Amsterdam, Holland, have invented a certain new and usefulImprovement in Crushing or Pulverizing -Machines, of which the followingis a specification.

My invention relates to improvements in crushing or pulverizingmachines, and principally to machines for further crushing orpulverizing ore or the like that has been already broken down, theobject of same being to produce a machine of simple construc tion andone reliable and effective in operation.

The machine consists of a closed drum in which work two or morerotatable arms or boaters with removable heads mounted on a shaft, theinterior peripheral surface of the drum being lined with removable steelsegments of shapes making up an undulating surface. .The material is fedinto the drum from the side and is pulverized by the blow from thehammers and the impact against the segments, the shape of the latterdriving back the material against the hammers, from which it is againthrown down, and so on until it is finally expelled in the form ofpowder through an opening in the peripheral surface. Two of such drumsmay be arranged to work from a common shaft and driving-pulley.

One form of machine constructed according to my invention is illustratedin the accompanying drawings, in which- Figure 1 is a side elevation ofa machine having two drums, the left-hand side of the machine beingpartly in section. Fig. 2 is on the left a section on the line I II ofFig. 1, the driving-pulley being removed, and on the right an endelevation, the driving-pulley and end wall of the drum being removed.

On both ends of the shaft 1), which runs in the bearings c and is drivenby the rope-pulley at, are mounted the double heaters or arms 61, whichrevolve inside the drums. To the ends of these beaters heavyhammer-heads e are secured in a suitable manner. The two sets of heatersare mounted at a mutual angle of ninety degrees in order to insure theproper counterpoising of the hammers and the easy running of themachine. The drums consist of a strong ring J", an inner end wall g, andan outer end wall 72. These parts are held together by screw-bolts, ofwhich the bolts t merely pass through the ring f and the end walls g andh of each drum, whereas the stay-boltsj pass through both drums andconnect them rigidly together, and the bolts 70 serve both to hold eachdrum together and attach the same to the base-plate Z, which latter, ascan be seen from Fig. 1, is cast in a single piece with thebearing-frame c and is in turn bolted to the supporting-girders m. Theinner end wall 9 of each drum is provided with an opening it in directcommunication With the charging chute 0, Fig. 2, which is carried abovethe rope-pulley a, Fig. l, and distributes the ore or material into thetwo drums.

The peripheral ring f is covered on the inner side with steel segmentsp, which fit tightly together and can be taken apart on loosening thewedge q. These steel segments are of such a pattern that when placed inposition they form a peripheral surface of wavy contour, as shown inFig. 2. The ring is not continued quite all around the drum, but has anopening 1" on the right-hand side, Fig. 2, communicating direct with thedischargingchute s. The size of this opening is regulated by the lengthof the end segments or pieces 75, which may have rounded ends to allowof a proper passage for the material. This opening depends upon theamount of work to be done by the machine and will vary according to theworking speed and the kind of material to be crushed.

As soon as the ore or material enters the drum through the opening at itis struck by one of the hammer-heads e and, as a result of the force ofthe blow and the impact against the wavy peripheral ring, is broken andpulverized almost immediately. Thrown backward by the projectingportions of the shoes 19, the ore is again immediately struck by one ofthe hammer-heads, and this operation is repeated until thethoroughly-pulverized ore is driven out centrifugally by the heaters orhammers through the opening 7" into the discharging-chute s.

The hammer-heads e, the steel shoes 19, and

the end pieces 25 are rapidly worn away, and

for this reason provision is made for these parts to be easily taken outand replaced by new ones.

In practice only the leading side of the undulation on each segmentreceives the impact of the material, and hence such segment is worn, asshown by the dotted line a: in Fig. 2. To make the segments, therefore,more lasting, I form the undulations, preferably, equal sided, so thatthe segments may be turned end for end when the wear has rendered themless efficient. When the other side is worn down in the same manner, thesegment is taken out and replaced by a new one.

What I claim is+ In a crushing and pulverizing machine, two drums eachconsisting of a ring having an opening and circular end plates fittedagainst the rings, tie-bolts passing through the end plates and rings ofboth drums to thereby rigidly unite the same, a second series of boltspassing through the end plates and ring of each drum, a plurality ofsegments in the drum bearing against the inner surfaces of the rings,having undulatory working surfaces, Wedges fitted against the segmentsand secured to the rings, a shaft extending centrally through saidplates, radial arms in the drums, on the ends of the shaft, detachablehammer-heads secured to said arms, a driving member on said shaftbetween the drums, a hopper between said drums and located over saiddriving member, said hopper having supply-spouts leading to openings inthe inner plates of said drums, a bearing-frame for said shaft, abase-piece rigidly connected with the bearing-frame and bolted to theinner of said circular end plates, and discharge chutes leading from theopenings in said rings, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of tWosubscribing witnesses.

CORNELIS FREDRIK DELFOS.

Witnesses:

THOMAS HERMANUS VERHAVE, Aucus'r SIEGFRIED DoonN.

